Ok, Agassi was prob the wrong pro to check out since we're in the realm of modern tennis, my bad. It does look to me, though, like the more bent/tucked in the elbow remains throughout the back swing, the less ssc there is (which I would think means it's somewhat grip related. Hopefully I'll be right on some part of this and not go 0 for 100 haha)

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"Why should the devil have all the good music?" Kevin Max, formerly of DC Talk